- Title Pages
- [UNTITLED]
- List of Contributors
- List of Tables
- List of Figures
- Preface
-
One Introduction -
Two Whales, Interaction Webs, and Zero-Sum Ecology -
Three Lessons from Land Present and Past Signs of Ecological Decay and the Overture to Earth’s Sixth Mass Extinctio -
Four When Ecological Pyramids Were Upside Down -
Five Pelagic Ecosystem Response to a Century of Commercial Fishing and Whaling -
Six Evidence for Bottom-Up Control of Upper-Trophic-Level Marine Populations -
Seven Evolutionary Patterns in Cetacea Fishing Up Prey Size through Deep Time -
Eight A Taxonomy of World Whaling -
Nine The History of Whales Read from DNA -
Ten Changes in Marine Mammal Biomass in the Bering Sea/Aleutian Islands Region before and after the Period of Commercial Whaling -
Eleven Industrial Whaling in the North Pacific Ocean 1952–1978 -
Twelve Worldwide Distribution and Abundance of Killer Whales -
Thirteen The Natural History and Ecology of Killer Whales -
Fourteen Killer Whales as Predators of Large Baleen Whales and Sperm Whales -
Fifteen Physiological and Ecological Consequences of Extreme Body Size in Whales -
Sixteen Ecosystem Impact of the Decline of Large Whales in the North Pacific -
Seventeen The Removal of Large Whales from the Southern Ocean -
Eighteen Great Whales as Prey Using Demography and Bioenergetics to Infer Interactions in Marine Mammal Communities -
Nineteen Whales and Whaling in the North Pacific Ocean and Bering Sea Oceanographic Insights and Ecosystem Impacts -
Twenty Legacy of Industrial Whaling -
Twenty-One Predator Diet Breadth and Prey Population Dynamics -
Twenty-Two Bigger is Better -
TWENTY-THREE Gray Whales in the Bering and Chukchi Seas -
Twenty-Four Whales, Whaling, and Ecosystems in the North Atlantic Ocean -
Twenty-Five Sperm Whales in Ocean Ecosystems -
Twe Nty-Six Ecosystem Effects of Fishing and Whaling in the North Pacific and Atlantic Oceans -
Twenty-Seven Potential Influences of Whaling on the Status and Trends of Pinniped Populations -
Twenty-Eight The Dynamic Between Social Systems and Ocean Ecosystems -
Twenty-Nine Whaling, Law, and Culture -
Thirty Whales Are Big and It Matters -
Thirty-One Retrospection and Review - Index
Changes in Marine Mammal Biomass in the Bering Sea/Aleutian Islands Region before and after the Period of Commercial Whaling
Changes in Marine Mammal Biomass in the Bering Sea/Aleutian Islands Region before and after the Period of Commercial Whaling
- Chapter:
- (p.116) Ten Changes in Marine Mammal Biomass in the Bering Sea/Aleutian Islands Region before and after the Period of Commercial Whaling
- Source:
- Whales, Whaling, and Ocean Ecosystems
- Author(s):
BETE PFISTER
DOUGLAS P. DEMASTER
- Publisher:
- University of California Press
A basic understanding of pre-commercial harvest and current abundance of marine mammals is critical before trophic effects can be evaluated. This chapter provides such a foundation to facilitate further evaluation of the nature and magnitude of the impacts of commercial whaling on the North Pacific ecosystem. It considers two factors when addressing this question. First, it is necessary to account for seasonal changes in biomass. Second, some species of marine mammals have age- or sex-specific migratory patterns that must also be accounted for when evaluating the effects of commercial whaling on the marine mammal community in the North Pacific. This chapter documents the overall change in marine mammal biomass of one ecosystem, the Bering Sea and Aleutian Islands region, from the onset of commercial harvesting of large whales and pinnipeds to the present.
Keywords: pre-commercial harvest, marine animals, North Pacific ecosystem, biomass, migratory patterns
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- Title Pages
- [UNTITLED]
- List of Contributors
- List of Tables
- List of Figures
- Preface
-
One Introduction -
Two Whales, Interaction Webs, and Zero-Sum Ecology -
Three Lessons from Land Present and Past Signs of Ecological Decay and the Overture to Earth’s Sixth Mass Extinctio -
Four When Ecological Pyramids Were Upside Down -
Five Pelagic Ecosystem Response to a Century of Commercial Fishing and Whaling -
Six Evidence for Bottom-Up Control of Upper-Trophic-Level Marine Populations -
Seven Evolutionary Patterns in Cetacea Fishing Up Prey Size through Deep Time -
Eight A Taxonomy of World Whaling -
Nine The History of Whales Read from DNA -
Ten Changes in Marine Mammal Biomass in the Bering Sea/Aleutian Islands Region before and after the Period of Commercial Whaling -
Eleven Industrial Whaling in the North Pacific Ocean 1952–1978 -
Twelve Worldwide Distribution and Abundance of Killer Whales -
Thirteen The Natural History and Ecology of Killer Whales -
Fourteen Killer Whales as Predators of Large Baleen Whales and Sperm Whales -
Fifteen Physiological and Ecological Consequences of Extreme Body Size in Whales -
Sixteen Ecosystem Impact of the Decline of Large Whales in the North Pacific -
Seventeen The Removal of Large Whales from the Southern Ocean -
Eighteen Great Whales as Prey Using Demography and Bioenergetics to Infer Interactions in Marine Mammal Communities -
Nineteen Whales and Whaling in the North Pacific Ocean and Bering Sea Oceanographic Insights and Ecosystem Impacts -
Twenty Legacy of Industrial Whaling -
Twenty-One Predator Diet Breadth and Prey Population Dynamics -
Twenty-Two Bigger is Better -
TWENTY-THREE Gray Whales in the Bering and Chukchi Seas -
Twenty-Four Whales, Whaling, and Ecosystems in the North Atlantic Ocean -
Twenty-Five Sperm Whales in Ocean Ecosystems -
Twe Nty-Six Ecosystem Effects of Fishing and Whaling in the North Pacific and Atlantic Oceans -
Twenty-Seven Potential Influences of Whaling on the Status and Trends of Pinniped Populations -
Twenty-Eight The Dynamic Between Social Systems and Ocean Ecosystems -
Twenty-Nine Whaling, Law, and Culture -
Thirty Whales Are Big and It Matters -
Thirty-One Retrospection and Review - Index
